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    <title>Document</title>
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<body>
    <script>
        // 声明 Map
        let m = new Map()

        // 添加元素
        m.set('name','尚硅谷')
        m.set('change',function(){
            console.log('hello')
        })
        let key = {
            school : 'ATGUIGU'
        }
        m.set(key, ['北京','上海','深圳'])

        // size
        // console.log(m.size)
        
        // 删除
        // m.delete('name')

        // 获取
        // console.log(m.get('change'))
        // console.log(m.get(key))

        // 清空
        // m.clear()

        // 遍历
        for(let v of m){
            console.log(v)
        }

        // console.log(m)
    </script>
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